You are given a sentence and a question. You're expected to write the correct answer based on the sentence.

Sentence: A tree trunk is thicker then a tree leaf. Question: Which part of the tree is the stronger one?
trunk

Sentence: John loves watching football. He watches his favorite player run 80 yards for a touchdown. Question: Who is sweating less John or his favorite football player?
John

Sentence: Bob was cleaning with a scrub brush. He cleaned both tile and carpet. He noted that the carpet caused more friction. Question: Which surface would cause the scrub brush to scrub with less speed?

The carpet

